Local BLM groups are civil rights groups! Including the ones where I live. I would bet no one at aim.org had EVER gone to a civil rights meeting or met with or spoken to BLM activists doing anti-violence work and police reform work among so much else I their communities. People talk about BLM like this monolithic thing but it’s a movement made of real people whose work we can read and see and support. So that’s where I’m coming from here as a white guy who lives in a historically black city.
Fwiw, I wouldn’t even call antifa an organized political movement but I have seen antifa groups rally to counter protest white nationalists locally and I’m grateful that they’ve done so.